Oregano, also known as dysentery grass, Elsholtzia, mint, Oregon grass, pizza grass, mushroom grass, is a perennial herb in the genus Oregano of the family Labiatae, which is mainly found in the Mediterranean Sea, Central Asia, North Africa, North America, and most parts of China. Oregano rhizome oblique, nodes with slender fibrous roots, stems erect or ambulatory near the base; leaves stalked, stalk 2-7 mm long, ventral surface with grooves, abaxial surface nearly rounded, pilose, leaf blade ovate-orbicular or oblong-ovate-orbicular.

Order in a corymbose panicle, open, many-flowered crowded, composed of numerous oblong at the time of fruiting more or less elongated spikelets, the styles slightly beyond the stamens, the apex unequally 2-lobed, lobes subulate. Oregano contains more than 30 kinds of antibacterial compounds, is a potential natural antibiotic and drug growth promoter; the whole herb can be used as medicine, taste pungent, cool nature, non-toxic, with clearing away heat and relieving epidemiology, regulating qi and resolving dampness, inverting urine and eliminating swellings and other efficacy, clinically used for the prevention of influenza and the treatment of gangrene, heatstroke, fever, vomiting, acute gastroenteritis, abdominal pain and other illnesses.

It is said that since the Middle Ages in Europe, the special flavor of oregano has attracted a lot of people, not only to make it into an incense bag to carry around, but also in the field of cooking and flower tea has also occupied a place. Oregano, whose English name is Oregano, is native to the Mediterranean coast, North Africa and West Asia, and is a perennial herb in the genus Oregano of the family Labiatae. As oregano is commonly used to flavor Italian pizzas, it is also known as pizza herb, as well as Oregano, Oregano and other aliases.

Oregano Elsholtzia (Yunnan Materia Medica), White Flower, Fragrant Ru Grass, Qixiang (Kunming, Yunnan), Milk Fragrance Grass, Fragrant Ru Grass, Elsholtzia, Manshan Fragrance (Qujing, Yunnan), Suzi Grass, Elsholtzia, Fragrant Ru Grass, Yulan Zhi, Loluo Fragrance, Mountain Peppermint, Mantiansing (Yunnan), Manshan Po Fragrance (Jianhe, Fanjingshan, Guizhou), Earth Fragrant Elsholtzia (Guiyang, Guizhou and Tongren, Tongren, Guizhou), Patchouli Grass (urn'an, Guizhou), Xiaotian Grass (Guizhou), Earth Elshotsholtzia, Xiangfu Grass, Xiangru Grass, Elderberry Grass (Sichuan), White-flowered Fungus Chen,, Glutinous Rice Strip (Jiangxi), Wild Thornywort, Follower's Scripture Grass (Jiangsu), Earth Fungus Chen (Fujian), Wild Peppermint, Five Fragrant Grasses, Department of Grasses (Shaanxi), Small-leafed Peppermint (Botanical Names and Facts Diagrams).

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